COMPANY ACTIVE PIXEL WITH LOW-NOISE SNAPSHOT IMAGE FORMATION

摘要

A low-noise active pixel circuit (10) is disclosed that suppresses reset (kTC) noise by using a compact preamplifier consisting of a photodetector (12) and only four MOSFETs (M1, M2, M3, M4) identical polarity, in conjunction with ancillary circuits located on an imager's periphery. The supporting circuit help the simplified pixel circuit to synchronously acquire (i.e., take a snapshot) an image across an imaging array, read the signal with low noise, and efficiently resent the pixel with low noise.